Hi.
The access to the heater and other components is through the toe panel.
Using the potty knife release 2 clips(one on each side top) and open the panel.
If the dryer is working but not heating it's not the thermal fuse.
First of all check your circuit beakers, flip them back and forth.
Then check the heating element, the hi - limit, the thermal cut off.
You may want to remove the filter housing for easier access.
The hi -limit
Part number: AP2973862 
The heating element
Part number: AP2947033 
The thermal cut off
Part number: AP3094224 
Here are the breakdown diagrams and
Replacement parts for Whirlpool GEQ9800LW1 27"ELECTRIC DRYER | AppliancePartsPros.com
Thank you. Post the results.
Simon.